package ebook.thinking.chapter21.cooperation;


import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

/**
 * Created by Administrator on 2016/4/16.
 */
public class Restaurant {
    Meal meal;
    Chef chef = new Chef(this);
    WaitPerson waitPerson = new WaitPerson(this);
    ExecutorService exec = Executors.newCachedThreadPool();
    public Restaurant() {
        exec.execute(chef);
        exec.execute(waitPerson);
    }
    public static void main(String[] args) {
        new Restaurant();
    }
}

class Meal{
    private final int orderNum;

    public Meal(int orderNum) {
        this.orderNum = orderNum;
    }
    public String toString() {
        return "Meal " + orderNum;
    }
}

class WaitPerson implements Runnable{
    private Restaurant restaurant;

    public WaitPerson(Restaurant restaurant) {
        this.restaurant = restaurant;
    }

    @Override
    public void run() {
        try{
            while(!Thread.interrupted()){
                synchronized (this){
                    while(restaurant.meal == null){
                        wait();
                    }
                }
                System.out.println("Waitpseron got " + restaurant.meal);
                synchronized (restaurant.chef) {
                    restaurant.meal = null;
                    restaurant.chef.notifyAll();
                }
            }
        } catch (InterruptedException e) {
            System.out.println("WaitPerson interrupted.");
        }
    }
}

class Chef implements Runnable{
    private Restaurant restaurant;

    private int count = 0;

    public Chef(Restaurant restaurant) {
        this.restaurant = restaurant;
    }

    @Override
    public void run() {
        try{
            while(!Thread.interrupted()){
                synchronized (this){
                    while(restaurant.meal != null){
                        wait();
                    }
                }
                if(++count == 10){
                    System.out.println("Out of food, closing");
                    restaurant.exec.shutdownNow();
                }
                System.out.print("Order up!");
                synchronized (restaurant.waitPerson) {
                    restaurant.meal = new Meal(count);
                    restaurant.waitPerson.notifyAll();
                }
                TimeUnit.MILLISECONDS.sleep(100);
            }
        } catch (InterruptedException e) {
            System.out.println("Chef interrupted.");
        }
    }
}